AS25512
Cd-telematika A.S. — cdt.cz
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Summary
| Country |
 Czechia
|
| Organization | Cd-telematika A.S. |
| Domain | cdt.cz |
| Number of IPv4 | 117,760 |
| Number of IPv6 | 7.9228× 1028 |
| AS Type | ISP |
| Registry | RIPE NCC |
| Allocated | December 17, 2002 (about 23 years ago) |
| Updated | July 29, 2025 (about 2 months ago) |
IP Ranges
AS25512 announces 11 IPv4 ranges and 1 IPv6 range.
That's a total of 117,760 IPv4 addresses and 7.9228× 1028 IPv6 addresses.
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 81.19.32.0/20 |
PROVIDER
|
4,096 | RIPE NCC | ASSIGNED PA |
| 82.117.128.0/19 |
Datis O.Z., Ceske Drahy A.S.
|
8,192 | RIPE NCC | ASSIGNED PA |
| 82.202.64.0/18 |
Josef Skoda
|
16,384 | RIPE NCC | ASSIGNED PA |
| 85.13.64.0/18 |
Petr Hormann
|
16,384 | RIPE NCC | ASSIGNED PA |
| 85.184.16.0/20 |
Cd-telematika A.S.
|
4,096 | RIPE NCC | ALLOCATED PA |
| 89.203.128.0/17 |
Libcice Net
|
32,768 | RIPE NCC | ASSIGNED PA |
| 131.117.192.0/21 |
PROVIDER
|
2,048 | RIPE NCC | ASSIGNED PA |
| 185.134.0.0/22 |
PROVIDER
|
1,024 | RIPE NCC | ASSIGNED PA |
| 195.146.96.0/19 |
Spolecenstvi Vlastniku Jednotek
|
8,192 | RIPE NCC | ASSIGNED PA |
| 212.11.96.0/19 |
Letiste Praha
|
8,192 | RIPE NCC | ASSIGNED PA |
| 213.235.128.0/18 |
Praha
|
16,384 | RIPE NCC | ASSIGNED PA |
| Prefix | Organization | Size | Registry | Status |
|---|---|---|---|---|
| 2001:1a48::/32 |
Cd-telematika A.S.
|
7.9228× 1028 | RIPE NCC | ALLOCATED-BY-RIR |
Peers
AS25512 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.
Upstreams
AS25512 connects to the global Internet via at least 2 upstream providers. In this setup, AS25512 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.
Downstreams
AS25512 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS25512's role in extending Internet access beyond its own infrastructure.